Source: youtube.com

5. Red Hulk

General Thunderbolt Ross hated Hulk for as long as Hulk smashed the bejeezus out of the New Mexico desert with his big green Hulk fists.

And as time progressed, good ol' Ross spent probably millions of dollars of military industrial complex money trying to kill a giant green monster who just wanted to be left alone. But Ross would eventually become what he hated most: a Hulk. In the aftermath of Hulk's alien-backed assault on Earth during World War Hulk, Ross took the next step and powered himself up into a brand new, very strong, fire-blooded Hulk known as the Red Hulk.

His first act was to gun down the Abomination and go on a tear, fighting most of the Marvel Universe's main heroes. Eventually he was discovered and at least partially reformed, even joining the Avengers for a time.

There’s also a brand new Red Hulk on the current U.S. Avengers roster. He has a sweet mustache, and that’s all there is to say about him.